BS EN 28654:1993 Colours of gold alloys. Definition, range of colours and designation
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In the manufacture and sale of articles made of or coated with gold alloy, the colour of the surface of the product is an important characteristic. However, at present, an undue variety of colours of surface finishes is offered to the public. Some of these colours differ only slightly from one another.
The range of colours defined in this International Standard is in- tended to enable the manufacturer to limit the stock of different colours that he might be obliged to keep. It will also enable the purchaser to define his requirements with precision by referring to the designations given within this International Standard and so avoid the need for purchasing orders to be accompanied by colour samples.
This International Standard specifies a limited number of colours of gold alloys.
By specifying a range of gold alloy colours, this International Standard enables a corresponding range of polished gold colour slips to be produced for comparison purposes for use inroutine transactions between manufacturer and purchaser. It applies to jewellery, and to watch cases and accessories made of gold alloys or watch cases and accessories with gold alloy coverings.
